A mutation is a change in the sequence of DNA. Mutations can occur as a result of DNA copying errors during cell division, absorbing exposure to radiation, mutagen exposure, or virus attack.
Why are mutations beneficial and important?
Mutations are necessary for evolution to occur because they enhance genetic variation and the possibility of individual differences. The vast majority of mutations have no effect on the organisms in which they arise. Natural selection may increase the frequency of beneficial mutations.
Thus, Option B is the correct Option.
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